我已经开始使用 Nutch，一切都很好，直到我遇到IOException异常，
$ ./nutch crawl urls -dir myCrawl -depth 2 -topN 4
cygpath: can't convert empty path
solrUrl is not set, indexing will be skipped...
crawl started in: myCrawl
rootUrlDir = urls
threads = 10
depth = 2
solrUrl=null
topN = 4
Injector: starting at 2012-06-23 03:37:51
Injector: crawlDb: myCrawl/crawldb
Injector: urlDir: urls
Injector: Converting injected urls to crawl db entries.
Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Rahul\mapred\staging\Rahul255889423\.staging to 0700
at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:682)
at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:655)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:509)
at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:344)
at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:189)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:116)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:856)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:850)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1083)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:850)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:824)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1261)
at org.apache.nutch.crawl.Injector.inject(Injector.java:217)
at org.apache.nutch.crawl.Crawl.run(Crawl.java:127)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)
@jeffery --- 我降级了我的 nutch 版本 n 遇到了一个新问题，这超出了我的理解范围......请帮助......
$ ./nutch crawl urls -dir myCrawl -depth 4 -topN 5
cygpath: can't convert empty path
solrUrl is not set, indexing will be skipped...
crawl started in: myCrawl
root UrlDir = urls
threads = 10
depth = 4
solrUrl=null
topN = 5
Injector: starting at 2012-06-23 22:30:28
Injector: crawlDb: myCrawl/crawldb
Injector: urlDir: urls
Injector: Converting injected urls to crawl db entries.
Exception in thread "main" java.io.IOException: Job failed!
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1252)
at org.apache.nutch.crawl.Injector.inject(Injector.java:217)
at org.apache.nutch.crawl.Crawl.run(Crawl.java:127)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)
这个tym有什么问题？？？